Abstract

We review quantum-dot color conversion for micro-LED microdisplays targeting two near-eye applications, MR and AR, whose requirements differ despite shared needs for fine pitch and PWM drive. MR needs large area for wide field of view but only moderate brightness and no strong collimation; see-through AR demands meganit-class brightness and tight collimation from a small emitter.

Modeling color-conversion light-extraction efficiency, we identify feasible QD or perovskite nanoparticles optical properties — notably blue absorption optical density — and a conversion-cell design giving high efficiency with low optical crosstalk. For an MR white panel we then project two-digit milliwatt power, competitive with micro-OLED, while brightness and persistence remain far superior. Converting efficacy into device stress yields distinct reliability targets: roughly 50 h at 2.5 W/cm² for low-duty MR, versus >100 h at 25 W/cm² for AR. The former appears reachable today; AR requires further QD/nanoparticles development.

Dr. Dmitry Sizov – Research Scientist on Meta’s µLED team

Dr. Dmitry Sizov is a MicroLED Research Scientist on Meta’s uLED team, where he works on emitter physics, device design, metrology,  and process–performance correlation for next-generation display systems. His professional interests center on emissive devices and photonics, with a particular focus on direct-emission and color-conversion micro-LED pixel architectures.

Dmitry brings over 20 years of experience across variety of semiconductor light emitters, covering essentially every material system used for visible and near-infrared emission: III-nitrides for blue and green, III-phosphides for red, and GaAs, InP, GaSb-based structures for the infrared. He spent approximately ten years as a display engineer at Apple, developing microLED technology across all emission colors and their respective material systems, together with the optics, light extraction, and panel architecture that turn emitters into a display; he is first-named inventor on multiple Apple’s microLED display-panel patent families. Earlier, at Corning Incorporated, he developed group-III-nitride green laser diodes and was among the first to demonstrate lasing near 500 nm — a milestone toward closing the “green gap” — alongside near to mid infrared lasers of other material systems. A recurring theme across his career is achieving efficient emission where the materials resist it: the green gap in InGaN, non-radiative sidewall recombination in red microLEDs, and light extraction at small pixel pitch.

Dmitry earned his PhD in semiconductor optoelectronics from the A.F. Ioffe Physico-Technical Institute in St. Petersburg, Russia, in 2006. He has authored more than 50 academic publications, including a widely cited comparison of lasers and LEDs for solid-state lighting, and is an inventor on over 20 patent families. He is a Senior Member of the IEEE and a long-standing member of the Society for Information Display.